Pith Number

pith:NJIR3CN5

pith:2021:NJIR3CN5BDEODBTKKKSXFFY7S6

not attested not anchored not stored refs pending

Self-Supervised Learning for Fine-Grained Image Classification

Farha Al Breiki, Muhammad Ridzuan, Rushali Grandhe

arxiv:2107.13973 v1 · 2021-07-29 · cs.CV · cs.AI · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NJIR3CN5BDEODBTKKKSXFFY7S6}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T03:01:42.532192Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a511d89bd08c8e1866a52a572971f9781980c7f5b58b4064c529b88431bbf5f

Aliases

arxiv: 2107.13973 · arxiv_version: 2107.13973v1 · doi: 10.48550/arxiv.2107.13973 · pith_short_12: NJIR3CN5BDEO · pith_short_16: NJIR3CN5BDEODBTK · pith_short_8: NJIR3CN5

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NJIR3CN5BDEODBTKKKSXFFY7S6 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6a511d89bd08c8e1866a52a572971f9781980c7f5b58b4064c529b88431bbf5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d7fd8ebbeb591c2c843f0318ffdf8ecaac6406b383ea247354545c34fe1002d",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-07-29T14:01:31Z",
    "title_canon_sha256": "6470dbedced1a6309fb451a2b5f6e013e7228483cef451a6a6c1208a2d5beb59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.13973",
    "kind": "arxiv",
    "version": 1
  }
}